:root {
  color-scheme: light;
  --color-primary: #1e40af;
  --color-primary-strong: #1e3a8a;
  --color-secondary: #3b82f6;
  --color-accent: #d97706;
  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-soft: #f1f5f9;
  --color-foreground: #0f172a;
  --color-muted: #e9eef6;
  --color-muted-foreground: #64748b;
  --color-border: #dbeafe;
  --color-rain: #dc2626;
  --color-warm: #16a34a;
  --color-fog: #64748b;
  --color-cold: #475569;
  --shadow-card: 0 8px 24px rgba(15, 23, 42, 0.08);
  --radius-card: 8px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --content-max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--color-background);
  color: var(--color-foreground);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
  letter-spacing: 0;
}

body {
  margin: 0;
}

a,
button,
select {
  touch-action: manipulation;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
select {
  min-height: 44px;
  border: 0;
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--color-secondary);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  left: 12px;
  top: 12px;
  z-index: 20;
  transform: translateY(-140%);
  border-radius: 6px;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 12px;
}

.skip-link:focus {
  transform: translateY(0);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(219, 234, 254, 0.9);
  background: rgba(248, 250, 252, 0.94);
  backdrop-filter: blur(10px);
}

.topbar__inner {
  width: min(100%, var(--content-max));
  margin: 0 auto;
  padding: 10px var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.brand {
  min-width: 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand__mark {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--color-primary);
  color: #fff;
}

.brand__mark svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 16px;
  line-height: 1.2;
}

.brand small {
  color: var(--color-muted-foreground);
  font-size: 12px;
}

.nav {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav::-webkit-scrollbar {
  display: none;
}

.nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 11px;
  color: var(--color-muted-foreground);
  font-size: 14px;
  white-space: nowrap;
  transition: background 180ms ease, color 180ms ease;
}

.nav a.is-active {
  background: var(--color-primary);
  color: #fff;
}

.app-shell {
  width: min(100%, var(--content-max));
  margin: 0 auto;
  padding: var(--space-4);
}

.page {
  display: grid;
  gap: var(--space-4);
}

.page-header {
  display: grid;
  gap: 6px;
}

.eyebrow {
  margin: 0;
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 700;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(28px, 7vw, 44px);
  line-height: 1.08;
}

h2 {
  margin-bottom: var(--space-3);
  font-size: 20px;
  line-height: 1.25;
}

h3 {
  margin-bottom: 8px;
  font-size: 16px;
  line-height: 1.3;
}

p {
  margin-bottom: 0;
}

.muted {
  color: var(--color-muted-foreground);
}

.number {
  font-variant-numeric: tabular-nums;
}

.grid {
  display: grid;
  gap: var(--space-4);
}

.grid--two {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid--three {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.grid--metric {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.panel {
  padding: var(--space-4);
}

.weather-hero {
  min-height: 260px;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  overflow: hidden;
  border-radius: var(--radius-card);
  background:
    linear-gradient(135deg, rgba(30, 64, 175, 0.96), rgba(59, 130, 246, 0.84)),
    #1e40af;
  color: #fff;
  padding: var(--space-5);
  position: relative;
}

.weather-hero::after {
  content: "";
  position: absolute;
  right: -44px;
  top: -38px;
  width: 180px;
  height: 180px;
  border: 20px solid rgba(255, 255, 255, 0.16);
  border-radius: 50%;
}

.weather-hero__content {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-3);
  align-content: center;
}

.weather-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.weather-hero__symbol {
  position: relative;
  z-index: 1;
  min-height: 120px;
  display: grid;
  place-items: center;
  align-self: center;
}

.weather-icon {
  width: 112px;
  height: 112px;
  display: block;
}

.weather-icon path,
.weather-icon circle,
.weather-icon line {
  fill: none;
  stroke: currentColor;
  stroke-width: 5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  min-height: 28px;
  border-radius: 999px;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.16);
  color: inherit;
  font-size: 13px;
  font-weight: 700;
}

.badge--light {
  background: var(--color-surface-soft);
  color: var(--color-primary);
}

.badge--rain {
  background: #fee2e2;
  color: var(--color-rain);
}

.badge--warm {
  background: #dcfce7;
  color: var(--color-warm);
}

.badge--fog {
  background: #e2e8f0;
  color: var(--color-fog);
}

.badge--source-ok {
  background: #dcfce7;
  color: #166534;
}

.badge--source-fallback {
  background: #fef3c7;
  color: #92400e;
}

.metric-card {
  min-height: 138px;
  padding: var(--space-4);
  display: grid;
  gap: 10px;
}

.metric-card__top {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
}

.metric-card__value {
  font-size: 28px;
  font-weight: 800;
  line-height: 1;
}

.meter {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--color-muted);
}

.meter span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
}

.gauge-metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.gauge-metric {
  --gauge-accent: var(--color-primary);
  --gauge-needle: var(--color-primary);
  --gauge-symbol: var(--color-secondary);
  min-height: 218px;
  padding: 14px 12px 16px;
  display: grid;
  justify-items: center;
  gap: 8px;
  overflow: hidden;
  text-align: center;
}

.gauge-metric--warm {
  --gauge-accent: var(--color-accent);
  --gauge-needle: #f97316;
  --gauge-symbol: #fb923c;
}

.gauge-metric__dial {
  width: min(100%, 152px);
  aspect-ratio: 1;
  display: block;
  overflow: visible;
}

.gauge-metric__track {
  fill: #f8fbff;
  stroke: #dbeafe;
  stroke-width: 7;
}

.gauge-metric__arc {
  fill: none;
  stroke: var(--gauge-accent);
  stroke-width: 7;
  stroke-linecap: round;
}

.gauge-metric__tick {
  stroke: #93c5fd;
  stroke-width: 1.4;
  stroke-linecap: round;
}

.gauge-metric__tick--major {
  stroke: var(--gauge-accent);
  stroke-width: 2.4;
}

.gauge-metric__symbol {
  color: var(--gauge-symbol);
  opacity: 0.34;
}

.gauge-metric__symbol-stroke,
.gauge-metric__symbol-stroke path,
.gauge-metric__symbol-stroke circle,
.gauge-metric__symbol-stroke line {
  fill: none;
  stroke: currentColor;
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.gauge-metric__symbol-fill {
  fill: currentColor;
}

.gauge-metric__symbol-fill-blue path:first-child {
  fill: rgba(59, 130, 246, 0.22);
}

.gauge-metric__needle {
  stroke: var(--gauge-needle);
  stroke-width: 5;
  stroke-linecap: round;
}

.gauge-metric__hub {
  fill: #ffffff;
  stroke: var(--gauge-needle);
  stroke-width: 4;
}

.gauge-metric__readout {
  fill: var(--color-primary);
  font-size: 18px;
  font-weight: 800;
  text-anchor: middle;
}

.gauge-metric--warm .gauge-metric__readout {
  fill: #b45309;
}

.gauge-metric__scale {
  fill: var(--color-muted-foreground);
  font-size: 8px;
  font-weight: 700;
  text-anchor: middle;
}

.gauge-metric__body {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.gauge-metric__body h3,
.gauge-metric__body p {
  overflow-wrap: anywhere;
}

.index-card,
.sector-card {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4);
}

.sector-card {
  color: inherit;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.sector-card:hover,
.sector-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--color-secondary);
  box-shadow: 0 14px 32px rgba(30, 64, 175, 0.13);
}

.card-row,
.stat-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.stat-row {
  color: var(--color-muted-foreground);
  font-size: 14px;
}

.stat-row strong {
  color: var(--color-foreground);
}

.quote-change--up {
  color: var(--color-warm);
}

.quote-change--down {
  color: var(--color-rain);
}

.leaderboard {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.leaderboard li {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  align-items: center;
  gap: 10px;
  min-height: 44px;
}

.rank {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--color-surface-soft);
  color: var(--color-primary);
  font-weight: 800;
}

.filters {
  display: grid;
  gap: var(--space-3);
}

.filter-row {
  display: grid;
  gap: 8px;
}

.segmented {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
}

.segmented button,
.select {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--color-foreground);
  padding: 0 12px;
}

.segmented button {
  white-space: nowrap;
}

.segmented button.is-active {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

.select {
  width: 100%;
}

.trend {
  width: 100%;
  height: 46px;
  overflow: visible;
}

.trend polyline {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.trend .trend-fill {
  fill: rgba(59, 130, 246, 0.12);
  stroke: none;
}

.reason-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.reason-list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
  padding: 12px;
  border-radius: 8px;
  background: var(--color-surface-soft);
}

.reason-icon {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #fff;
  color: var(--color-primary);
}

.disclaimer {
  border-left: 4px solid var(--color-accent);
  padding: var(--space-4);
  color: var(--color-muted-foreground);
  font-size: 13px;
}

.source-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: var(--color-muted-foreground);
  font-size: 13px;
}

.weather-hero .source-strip {
  color: rgba(255, 255, 255, 0.82);
}

.feedback {
  display: grid;
  gap: var(--space-3);
}

.feedback__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-primary);
  padding: 0 14px;
  font-weight: 700;
  cursor: pointer;
}

.button--primary {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

.empty-state,
.loading-view {
  min-height: 280px;
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--color-muted-foreground);
}

.loading-view {
  gap: var(--space-3);
}

.loading-view__mark {
  width: 46px;
  height: 46px;
  border: 4px solid var(--color-muted);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 900ms linear infinite;
}

.report-card {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5);
}

.method-list {
  display: grid;
  gap: var(--space-3);
}

.method-list article {
  padding: var(--space-4);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (min-width: 760px) {
  .weather-hero {
    grid-template-columns: minmax(0, 1.25fr) minmax(180px, 0.75fr);
    padding: var(--space-8);
  }

  .gauge-metric-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .filters {
    grid-template-columns: 220px 1fr;
    align-items: end;
  }
}

@media (max-width: 620px) {
  .topbar__inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    width: 100%;
  }

  .nav a {
    flex: 1 0 auto;
  }

  .app-shell {
    padding: var(--space-3);
  }

  h1 {
    font-size: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}